class HeaderBag in Zircon Profile 8
Same name and namespace in other branches
- 8.0 vendor/symfony/http-foundation/HeaderBag.php \Symfony\Component\HttpFoundation\HeaderBag
HeaderBag is a container for HTTP headers.
@author Fabien Potencier <fabien@symfony.com>
Hierarchy
- class \Symfony\Component\HttpFoundation\HeaderBag implements \Symfony\Component\HttpFoundation\IteratorAggregate, \Symfony\Component\HttpFoundation\Countable
Expanded class hierarchy of HeaderBag
2 files declare their use of HeaderBag
- HeaderBagTest.php in vendor/
symfony/ http-foundation/ Tests/ HeaderBagTest.php - RequestDataCollector.php in vendor/
symfony/ http-kernel/ DataCollector/ RequestDataCollector.php
File
- vendor/
symfony/ http-foundation/ HeaderBag.php, line 19
Namespace
Symfony\Component\HttpFoundationView source
class HeaderBag implements \IteratorAggregate, \Countable {
protected $headers = array();
protected $cacheControl = array();
/**
* Constructor.
*
* @param array $headers An array of HTTP headers
*/
public function __construct(array $headers = array()) {
foreach ($headers as $key => $values) {
$this
->set($key, $values);
}
}
/**
* Returns the headers as a string.
*
* @return string The headers
*/
public function __toString() {
if (!$this->headers) {
return '';
}
$max = max(array_map('strlen', array_keys($this->headers))) + 1;
$content = '';
ksort($this->headers);
foreach ($this->headers as $name => $values) {
$name = implode('-', array_map('ucfirst', explode('-', $name)));
foreach ($values as $value) {
$content .= sprintf("%-{$max}s %s\r\n", $name . ':', $value);
}
}
return $content;
}
/**
* Returns the headers.
*
* @return array An array of headers
*/
public function all() {
return $this->headers;
}
/**
* Returns the parameter keys.
*
* @return array An array of parameter keys
*/
public function keys() {
return array_keys($this->headers);
}
/**
* Replaces the current HTTP headers by a new set.
*
* @param array $headers An array of HTTP headers
*/
public function replace(array $headers = array()) {
$this->headers = array();
$this
->add($headers);
}
/**
* Adds new headers the current HTTP headers set.
*
* @param array $headers An array of HTTP headers
*/
public function add(array $headers) {
foreach ($headers as $key => $values) {
$this
->set($key, $values);
}
}
/**
* Returns a header value by name.
*
* @param string $key The header name
* @param mixed $default The default value
* @param bool $first Whether to return the first value or all header values
*
* @return string|array The first header value if $first is true, an array of values otherwise
*/
public function get($key, $default = null, $first = true) {
$key = strtr(strtolower($key), '_', '-');
if (!array_key_exists($key, $this->headers)) {
if (null === $default) {
return $first ? null : array();
}
return $first ? $default : array(
$default,
);
}
if ($first) {
return count($this->headers[$key]) ? $this->headers[$key][0] : $default;
}
return $this->headers[$key];
}
/**
* Sets a header by name.
*
* @param string $key The key
* @param string|array $values The value or an array of values
* @param bool $replace Whether to replace the actual value or not (true by default)
*/
public function set($key, $values, $replace = true) {
$key = strtr(strtolower($key), '_', '-');
$values = array_values((array) $values);
if (true === $replace || !isset($this->headers[$key])) {
$this->headers[$key] = $values;
}
else {
$this->headers[$key] = array_merge($this->headers[$key], $values);
}
if ('cache-control' === $key) {
$this->cacheControl = $this
->parseCacheControl($values[0]);
}
}
/**
* Returns true if the HTTP header is defined.
*
* @param string $key The HTTP header
*
* @return bool true if the parameter exists, false otherwise
*/
public function has($key) {
return array_key_exists(strtr(strtolower($key), '_', '-'), $this->headers);
}
/**
* Returns true if the given HTTP header contains the given value.
*
* @param string $key The HTTP header name
* @param string $value The HTTP value
*
* @return bool true if the value is contained in the header, false otherwise
*/
public function contains($key, $value) {
return in_array($value, $this
->get($key, null, false));
}
/**
* Removes a header.
*
* @param string $key The HTTP header name
*/
public function remove($key) {
$key = strtr(strtolower($key), '_', '-');
unset($this->headers[$key]);
if ('cache-control' === $key) {
$this->cacheControl = array();
}
}
/**
* Returns the HTTP header value converted to a date.
*
* @param string $key The parameter key
* @param \DateTime $default The default value
*
* @return null|\DateTime The parsed DateTime or the default value if the header does not exist
*
* @throws \RuntimeException When the HTTP header is not parseable
*/
public function getDate($key, \DateTime $default = null) {
if (null === ($value = $this
->get($key))) {
return $default;
}
if (false === ($date = \DateTime::createFromFormat(DATE_RFC2822, $value))) {
throw new \RuntimeException(sprintf('The %s HTTP header is not parseable (%s).', $key, $value));
}
return $date;
}
/**
* Adds a custom Cache-Control directive.
*
* @param string $key The Cache-Control directive name
* @param mixed $value The Cache-Control directive value
*/
public function addCacheControlDirective($key, $value = true) {
$this->cacheControl[$key] = $value;
$this
->set('Cache-Control', $this
->getCacheControlHeader());
}
/**
* Returns true if the Cache-Control directive is defined.
*
* @param string $key The Cache-Control directive
*
* @return bool true if the directive exists, false otherwise
*/
public function hasCacheControlDirective($key) {
return array_key_exists($key, $this->cacheControl);
}
/**
* Returns a Cache-Control directive value by name.
*
* @param string $key The directive name
*
* @return mixed|null The directive value if defined, null otherwise
*/
public function getCacheControlDirective($key) {
return array_key_exists($key, $this->cacheControl) ? $this->cacheControl[$key] : null;
}
/**
* Removes a Cache-Control directive.
*
* @param string $key The Cache-Control directive
*/
public function removeCacheControlDirective($key) {
unset($this->cacheControl[$key]);
$this
->set('Cache-Control', $this
->getCacheControlHeader());
}
/**
* Returns an iterator for headers.
*
* @return \ArrayIterator An \ArrayIterator instance
*/
public function getIterator() {
return new \ArrayIterator($this->headers);
}
/**
* Returns the number of headers.
*
* @return int The number of headers
*/
public function count() {
return count($this->headers);
}
protected function getCacheControlHeader() {
$parts = array();
ksort($this->cacheControl);
foreach ($this->cacheControl as $key => $value) {
if (true === $value) {
$parts[] = $key;
}
else {
if (preg_match('#[^a-zA-Z0-9._-]#', $value)) {
$value = '"' . $value . '"';
}
$parts[] = "{$key}={$value}";
}
}
return implode(', ', $parts);
}
/**
* Parses a Cache-Control HTTP header.
*
* @param string $header The value of the Cache-Control HTTP header
*
* @return array An array representing the attribute values
*/
protected function parseCacheControl($header) {
$cacheControl = array();
preg_match_all('#([a-zA-Z][a-zA-Z_-]*)\\s*(?:=(?:"([^"]*)"|([^ \\t",;]*)))?#', $header, $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
$cacheControl[strtolower($match[1])] = isset($match[3]) ? $match[3] : (isset($match[2]) ? $match[2] : true);
}
return $cacheControl;
}
}
Members
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
HeaderBag:: |
protected | property | ||
HeaderBag:: |
protected | property | ||
HeaderBag:: |
public | function | Adds new headers the current HTTP headers set. | |
HeaderBag:: |
public | function | Adds a custom Cache-Control directive. | |
HeaderBag:: |
public | function | Returns the headers. | |
HeaderBag:: |
public | function | Returns true if the given HTTP header contains the given value. | |
HeaderBag:: |
public | function | Returns the number of headers. | |
HeaderBag:: |
public | function | Returns a header value by name. | |
HeaderBag:: |
public | function | Returns a Cache-Control directive value by name. | 1 |
HeaderBag:: |
protected | function | ||
HeaderBag:: |
public | function | Returns the HTTP header value converted to a date. | |
HeaderBag:: |
public | function | Returns an iterator for headers. | |
HeaderBag:: |
public | function | Returns true if the HTTP header is defined. | |
HeaderBag:: |
public | function | Returns true if the Cache-Control directive is defined. | 1 |
HeaderBag:: |
public | function | Returns the parameter keys. | |
HeaderBag:: |
protected | function | Parses a Cache-Control HTTP header. | |
HeaderBag:: |
public | function | Removes a header. | 1 |
HeaderBag:: |
public | function | Removes a Cache-Control directive. | |
HeaderBag:: |
public | function | Replaces the current HTTP headers by a new set. | 1 |
HeaderBag:: |
public | function | Sets a header by name. | 1 |
HeaderBag:: |
public | function | Constructor. | 1 |
HeaderBag:: |
public | function | Returns the headers as a string. | 1 |